JP7034146B2 - Drum with stopper with liner and its manufacturing method - Google Patents

Description

The present invention is a stoppered drum for storing and transporting a particularly dangerous liquid or fluid filler into which a flexible liner with a filling and discharging connecting tube piece and an air supply connecting tube piece is inserted. Regarding.

For plugged drums equipped with a liner, the liquid filling does not contact the inside of the drum, only the inside of the liner. Reusing used, often expensive plugged drums simply requires the replacement of used, relatively inexpensive liners or film bags.

The present invention preferably relates to a particular plastic stoppered drum, but is basically, for example, a lidded drum with two stoppers on a drum lid, a facet with a side handle (Fassetts). Alternatively, it may be applied to another plastic container such as a canister with an upper handle.

A plugged drum made of thermoplastic plastic with a liner made of thin-walled plastic film inserted has a cylindrical drum wall, a disc-shaped lower bottom, and a disc-shaped upper bottom, and has an upper bottom. Two plug connection tube pieces of the same size that can be closed by a closing plug are arranged, one plug connection piece is formed as a filling / discharging plug connection piece, and the other plug is formed. The connecting pipe piece is formed as an air supply / exhaust plug connecting pipe piece, and the filling / discharging plug connecting pipe piece and the filling / discharging plug connecting pipe piece corresponding to the liner are contained in the filling / discharging plug connecting pipe piece, respectively. And a liner connection pipe piece for air supply and exhaust is attached. In this case, the closure plug for the air supply / exhaust plug connection tube piece is at least engaged to surround or cover the adapter ring, the adapter ring, a cap nut or ring nut, each with a central through opening, and a cap nut, and a ring nut. Further, it is formed from a plurality of portions with a central plug plug screwed into the central through opening of the adapter ring. The adapter ring is firmly welded to the upper end of the liner's air supply / exhaust plug connection pipe piece and is fixed in the air supply / exhaust plug connection pipe piece of the plugged drum via the flange ring by a screw-fitted ring nut. Has been done.

problem:
When selecting packaging materials for a wide variety of liquid fillings, for example in the case of stoppered drums with multi-layer liners inserted, it is necessary to select the liner blocking properties required for each filling. .. Sensitive liquid fillings can be affected and damaged, for example by diffused oxygen. However, a multi-layer liner having a blocking property is relatively expensive, has a very small impact / tear strength, and is constantly generated by a filling material that reciprocates during transportation of a liquid container and is filled with a liquid. Sustained dynamic alternating loads, such as constant movement of the liner film suspended only on the liner connecting tube piece in the air space above the column, can easily constrict the bend or fold. There is a risk of tearing, especially in the area of the liner connection tube piece.

Background technology:
The container itself, in which a plastic liner is inserted to avoid contact between the filling and the inner wall of the container, is well known. The container disclosed in the publication, US Pat. No. 4,993,579 (US 4993579A), consists primarily of a rigid enclosure and a liner in the form of elastic bubbles, which provide the volume of the exterior package when filled. Can be met. The air bubbles are anchored to the enclosure at a point away from the opening to prevent the air bubbles from moving toward the discharge opening and hindering the discharge when the container is emptied. The elastic bubbles at the time of filling can sufficiently fill the inside of the container. The proximity of air bubbles to the outer wall of the container improves stability. Such a structure is not suitable for multilayer films with blocking properties, which are typically not elastic enough to be applied against the outer wall of the vessel during filling.

The combination of plugged drum and liner described in WO 9426603 A1 requires an additional mounting opening of at least 80 mm. Therefore, this is not a standard container that can be easily used for existing filling equipment and pump discharge equipment. Additional openings that do not comply with the standard result in increased costs. In addition, additional openings provide additional potential airtightness in the exterior package. Here, the liner is not fixed to the inner wall of the drum. In other words, in this case as well, when a multi-layer liner with blocking characteristics is used, on the one hand it is based on the dynamic alternating load and on the other hand it is based on the small impact and tensile strength of this liner. Alternatively, there is a risk of tearing in the area of the liner connecting tube piece.

Finally, from the publication, US Pat. No. 5,217,138 (US 5217138), a thin drum in a plugged drum with a filling and drain plug connecting piece and an air supply / exhaust plug connecting piece at the top. The use of cylindrical liners made of plastic film is known. In this case, it relates to two liner connecting tube pieces in each plug connecting tube piece of the plugged drum. One liner connecting tube piece comprises a welded annular sleeve or adapter ring, and the annular sleeve or adapter ring is inserted and fixed from above into the air supply / exhaust plug connecting tube piece of the drum. The wound liner must also be inserted into the drum through this plug connection tube piece. After inserting the liner, pull out the second liner connecting tube piece through the drum plug connecting tube piece on the opposite side using a wire rod or the like, and drum until it can be tightly attached to the drum plug connecting tube piece. Must be rolled back and forth. After that, the liner is flexibly suspended from both liner plug connecting tube pieces provided on the drum. The intermediate air space between the liner and the inner wall of the drum will not be exhaustable after the liner is inserted, but the drum body will have another closed plug connection piece or another closed drum opening somewhere. Unless you have. When filling a drum with a plug via a filling / discharging plug connecting piece, in the air supply / exhaust plug connecting piece located on the opposite side, a smaller plug plug centrally located in the annular sleeve is screwed. It may be removed, which allows the air displaced by the filler to be evacuated from inside the liner. Intermediate space In order to bleed air, the drum filling must be provided with another separate exhaust opening to ensure quick exhaust, otherwise the planned filling amount should be fast enough. Since it cannot flow into the drum, the drum may easily overflow in the case of automatic filling equipment.

Task:
The problem underlying the present invention is to eliminate the drawbacks of the prior art pointed out, and to equip the existing standard-plugged drum with a replaceable liner, which is particularly handled by users or users such as fillers and ejectors. Occasionally, liner-equipped plugged drums are used in existing filling and pumping drainage equipment without any auxiliary means, with no differences or drawbacks compared to the same standard plugged drum without liner. To get it.

Solution:
This problem is solved by the special feature described in claim 1. Each of the features described in the subclaims represents the possibility of another advantageous configuration of a plugged drum with a liner according to the present invention.

The proposed technical teaching itself states that how to overcome the shortcomings of well-known plugged drums with liners, and that the handling of liner-equipped drums is no different from the handling of standard drums for fillers and ejectors. It simply conveys that.

This is structurally characterized by the following features:
-The two plug connecting tube pieces are formed as a standardized 2-inch plug connecting tube piece with a female thread (BCS70 x 6 closing means) and a seal pedestal located beneath it.
-The closing plug for the filling / discharging plug connecting pipe piece is a commercially available standardized 2-inch plug, which has a male thread (BCS70 x 6 closing means) and a filling / discharging plug located below it. It is formed with a seal ring that seals against the seal pedestal provided on the connecting pipe piece.
-The filling and exhaust plug connecting pipe piece has a smoothed annular surface welder inner surface at the narrowest penetration point in the connection pipe piece neck below the female thread, and the welder inner surface is a liner. The upper end of the liner connection pipe piece for filling and discharging is firmly welded.
-The plug plug screwed into the central through opening of the adapter ring is formed as a commercially available standardized 3/4 inch plug with a male thread and a seal ring located beneath it.
-The flange ring of the adapter ring, engaged from above by a threaded ring nut, has an annular seal ring on the outer edge of its underside, underneath the female thread provided on the air supply / exhaust plug connection tube piece. This is achieved by sealing the inside of the drum against the side seal pedestal.

In the configuration of the present invention, the threaded ring nut is covered with a position-fixing cap that is snap-fitted or tightened from above, and the position-fixing cap also has a center-through opening through which the center-through opening. It is assumed that the 3/4 inch plug plug screwed into the center of the adapter ring is freely accessible.

This structural configuration of the present invention is a central 3/4 inch plug in which an adapter ring with an annular seal ring on the underside of the flange ring is tightly screwed in when the ring nut is loosened or unwound. Along with the plug, it is formed to be liftable slightly upward by a traction tool that is guided and engaged through the vacuum bell, and when an annular gap is formed between the seal ring and the seal pedestal, It is envisioned that a vacuum pump connected to the vacuum bell through the annular gap allows evacuation within the intermediate air space between the liner surface and the inner wall of the drum.

The stoppered drum according to the invention is further evacuated and when the liner surface is applied almost completely or entirely to the inner wall of the drum, the adapter ring is 3/4 inch of the tightly screwed center. Along with the plug, it is formed so that it can be guided downward by a traction tool guided through the vacuum bell-shaped body, and the annular seal ring on the lower surface of the flange ring of the adapter is a plug connection pipe for air supply and exhaust. In one piece, it is formed to be firmly and airtightly pressed against a seal pedestal located below the female thread, and then is permanently fixed in an airtight position by a ring nut that is firmly screwed in from above. Is excellent in.

Due to the continuous vacuum in the intermediate air space between the liner and the inner wall of the drum, the liner film is relatively subject to dynamic alternating loads such as those that are constantly generated by the reciprocating impact of the filling during transport of the liquid container. Even if it continues for a long time, it keeps in contact with the inner wall of the drum as if it were "sucked", and there is no folding or movement of the liner film in the air space above the liquid filling column. The liner film no longer becomes dense or torn. Vacuum fixation of the liner film on the inner wall of the drum allows the liner to sit entirely on the inner wall of the drum like a "second jacket", which is advantageous and inexpensive with a relatively small tear strength. Liner film materials can also be used.

In another configuration of the present invention, when the liner surface is almost entirely applied to the inner surface of the inner wall of the drum after evacuation, the 2 inch plug on the filling side is unscrewed and 3 on the exhaust side. With the / 4 inch plug plug unscrewed, hot air is blown into the inside of the drum or liner, especially through the drum wall and the upper area of the top bottom, through, for example, a appropriately curved blow tube. It is assumed that this causes thermal activation of the liner film, which makes it easier for the outer surface of the liner to adhere to the inner surface of the drum wall. In this case, the blowing of hot air into the liner is advantageously done to obtain an improved adhesive action at increased pressure.

In order to ensure that there is no difference between the handling of a plugged drum with a liner according to the present invention and the handling of the same plugged drum without a liner for the filler and the ejector, in the present invention-the ring nut is stiff. Negative in the automatic filling equipment to fill the plugged drum with liquid filling through the pressure filling pipe through the filling and discharging plug connecting pipe piece located on the opposite side in the screwed state. To remove the liquid filling through the pressure suction tube-The centrally located 3/4 inch plug plug is now freely accessible via a positioning cap with a central through opening. It is assumed that the 3/4 inch plug is formed so that it can be automatically unscrewed and re-screwed by hand using a screw fastening tool or by an automatic screw fastening device. This also prevents accidental loosening of the pressing ring nut, especially with vacuum loss.

One advantageous feature of the liner is that the liner connecting tube pieces are welded from the inside to the liner wall at the bottom of the liner with a radially inward weld flange edge and folded back from the inside to the outside. All existing film cut edges will be covered so that they do not come into contact with the filler, and the film cut edges are also formed on the liner wall at the weld flange edges of the welded liner connection tube pieces. Even in the inner demarcation portion of the through opening, there is no contact with the filled liquid filling. This causes the solvent-containing filler to come into contact with one of the film cutting edges and penetrate and dissolve the adhesive-like adhesion mediator layer injected between the barrier layers, resulting in a particularly multi-layer liner. It is guaranteed that there is no risk of inconvenient peeling of the film layer and subsequent filling damage that impairs the blocking properties if the stoppered drum is transported for a relatively long period of time.

The method of making a stoppered drum with a liner according to the present invention is the following method step:
Two 2-inch plug connection tube pieces with -70x6 closing means, a commercially available 2-inch plug for 70x6 closing means, and a commercially available 3/4 inch plug for 70x6 closing means. A commercially available drum with a standard plug is prepared, and one 2-inch plug connecting tube piece equipped with a 2-inch plug is used as a filling / discharging plug for a liquid filling, and the other 2 inches. Steps in which the plug connection tube piece is used as an air supply / exhaust plug for the filling volume inside the liner and for the intermediate air space between the outer surface of the liner and the inner wall of the drum.
-A liner with two liner connecting tube pieces of different sizes, slightly longer with a free end provided and welded for a 2-inch plug connecting tube piece with 70x6 closure means. A hollow sleeve-like piece of liner connection that is made larger and shorter and slightly smaller, with a lower seal ring at the end of the liner connection piece. Steps to prepare a liner with a liner connection tube piece to which the adapter ring is welded,
-The step of winding the liner and forming an elongated roll with the welded adapter ring placed on top,
-A ring nut with an elongated roll inserted through the air supply / exhaust plug, a central through opening, and a male thread for 70 x 6 closing means in a 2-inch plug connection tube piece of the air supply / exhaust plug, an adapter. A step that secures the adapter ring with a ring nut that surrounds the ring and the adapter ring seals the intermediate air space between the outer surface of the liner and the inner wall of the drum within the 2-inch plug connection tube piece with the lower seal ring. ,
-The step of blowing compressed air into the air supply / exhaust plug until the liner is fully inflated and the larger welded liner connection tube piece is visible from the opposite filling / discharging plug.
-A step of cutting off the welded free end of the larger liner connecting tube piece and folding the liner connecting tube piece outward so that it covers the 2-inch plug connecting tube piece of the plugged drum.
-N. Step to cut out,
-With the vacuum bell-shaped body covered with the air supply / exhaust plug, the ring nut is loosened and the adapter ring is lifted, a negative pressure pump connected to the vacuum bell-shaped body is used between the outer surface of the liner and the inner wall of the drum. A step that draws all the air out of the intermediate air space and evacuates until the outer surface of the liner is fully applied to the inner wall of the drum.
-A step to permanently maintain the vacuum between the liner and the inner wall of the drum by tightening the ring nut and pressing the adapter ring with the lower seal ring within the 2-inch plug connection tube piece,
-Excellent based on the step of screwing a 2-inch plug into a 2-inch plug connecting tube piece of a filling and discharging plug and a 3/4 inch plug into a sleeve-shaped adapter ring with female threads. ..

To ensure the accidental loosening or twisting of the ring nut with vacuum loss, the 2-inch plug connection tube piece has a central through opening that allows free access to the central 3/4 plug. The position fixing cap is put on and fitted.

In an advantageous embodiment of the method based on each of the above method steps, compressed air is lined through a filling and discharging plug connecting piece located on the opposite side while evacuating through the air supply / exhaust plug connecting piece. It is blown into the interior, which causes the liner's liner film-especially in the upper bottom area around the buried plug housing-to be fully pressed against the inner wall of the plugged drum and to push out all intermediate space air. Is expected. In this case, the compressed air blown is high temperature air and is blown to heat-activate the liner film, so that the outer surface of the liner film exerts an adhesive action and adheres to the inner wall of the plugged drum. Alternatively, it will be attached so that it can be peeled off again.

With respect to the reuse of used plugged drums with liners, a significant advantage for readjustment factories is the adapter seal ring with the ring nut loosened and the adapter ring lifted to remove the liner from inside the drum. Through an annular gap between the stopper and the seal pedestal of the plug connecting tube piece, for example through a fitted compressed air bell and a connected compressed air conduit into the intermediate air space between the liner surface and the inner wall of the drum. This is the case when compressed air is blown in, which peels off the liner surface adhering to or affixing to the inner wall of the drum. In this case, evacuation is advantageously carried out through the filling and discharging plug connecting tube piece, for example, inside the liner via a covered vacuum bell, until the liner is completely detached from the inner wall of the drum.

Next, first, the liner connecting pipe piece welded to the filling and discharging plug connecting pipe piece is cut off just below the welded annular surface, slightly pulled out from the plug connecting pipe piece and sealed by welding, for example, thereby the drum. Internal pollution is avoided. After that, the entire liner is pulled out from the inside of the drum together with the adapter ring through the air supply / exhaust plug located on the opposite side. A new liner can be inserted and secured immediately after repairing the welded annular surface in the fill and drain plug to weld the larger liner connecting tube piece in the radial direction.

Containers used for liquid transport, such as pallet containers, stoppered drums and canisters, are processed for professional reuse in qualified readjustment plants, especially for new liners. Includes cleaning, testing, quality control and insertion.

In a plugged drum, if the liner's flexible, thin-walled filling and discharging connecting piece is tightly welded into the stable filling and discharging connecting piece of the stable plastic plugged drum connecting piece, the plug will be plugged. This fixation of the liner within the attached drum will be the easiest to handle for customers and users, i.e. fillers and ejectors of liquid fillings. This is because, when screwing or unscrewing screw caps, plug connecting pipe pieces, drainage parts or stir tools, traditionally frequent attachment of liner connecting pipe pieces by folding and tightening to rigid container connecting pipe pieces. This is because there is no risk of any twisting of the liner's flexible filling and discharging connecting tube pieces with wrinkle formation and tightness, as is the case with. In order to supply air to the inside of the drum or liner, as is customary, only the centrally located 3/4 inch plug in the exhaust plug located on the opposite side is unscrewed (from the adapter ring). Just do it.

Hereinafter, the present invention will be described in more detail based on examples in which the present invention is schematically shown in the drawings.
FIG. 3 is a perspective view showing a drum with a stopper according to the present invention in which a liner is inserted. It is a side view which shows the liner to be inserted for the drum with a plug shown in FIG. It is a side view which shows the wound liner before inserting into a drum with a stopper. FIG. 6 is a partial cross-sectional view showing around the upper region of a plastic plugged drum with a 2-inch plug connection piece and a welded liner connection piece. It is a partial cross-sectional view which shows the air supply / exhaust plug connection pipe piece together with a 3/4 inch plug plug which was unscrewed. It is another partial cross-sectional view which shows around the area of the air supply / exhaust plug connection tube piece which was fitted with the vacuum bell shape.

FIG. 1 shows, as a preferred embodiment, a drum with a stopper made of thermoplastic plastic, which is designated by reference numeral 10, and the drum with a stopper is equipped with an inserted liner 22 made of a thin-walled plastic film. ing. As described, the present invention may be similarly applied to other plastic containers such as canisters, facets, lidded drums with stoppered lids or pallet containers.

With respect to the loading or use of dangerous fillings, the stoppered drum 10 meets special test criteria and has been granted the corresponding official license. The stoppered drum 10 is particularly suitable for chemical products and foods in the most commonly used 220 liter volume size. The main components of the drum 10 with a stopper are a cylindrical drum wall 12, a disc-shaped lower bottom portion 14 and a disc-shaped upper bottom portion 16, and inside the upper bottom portion 16 is a plug connecting pipe piece 18 that can be closed by a closing plug. , 20 are arranged. Such plugged drums have a height of about 935 mm and a diameter of about 581 mm, are preferably manufactured by blow molding and are generally made of HDPE plastic material. The drum weight is about 8.2 kg. Modern drums consist of three layers, in which only the thin outer layer (20%) is colored blue and the thin, high-purity inner layer (20%) is made of new material, while supporting the middle. The layer (60%) consists of a regranulate, a plastic material reclaimed from a used plastic material.

In the drum 10 with a plug according to the present invention, one plug connecting pipe piece is formed as a filling / discharging plug connecting pipe piece 18, and the other plug connecting pipe piece is formed as a supply / exhaust plug connecting pipe piece 20. ing. The double plug connecting tube piece is formed as a 2-inch plug connecting tube piece provided with a BCS 70 × 6 screw fastening portion.

The liner 22 is attached to the filling / discharging connecting pipe piece 24 and the supply / exhaust connecting pipe piece 26, which are appropriately arranged, to these drum plug connecting pipe pieces.

In FIG. 2, the liner 22 is shown in a side view. The shape of the liner 22 is adapted to the inner wall of the drum and consists of a cylindrical liner wall 30, a disc-shaped liner top bottom 32 and a disc-shaped liner bottom 34. At a suitable position on the upper bottom portion 32 of the liner 22, a liner connecting tube piece 24 having a slightly larger diameter and a slightly longer diameter corresponding to the plug connecting tube piece 18 of the plugged drum 10 is arranged, and the opposite On the side, a slightly smaller and slightly shorter liner connecting pipe piece 26 corresponding to the air supply / exhaust plug connecting pipe piece 20 of the drum 10 with a plug is arranged. An adapter ring 28 is welded to the shorter liner connecting pipe piece 26, and the adapter ring 28 is inserted into the air supply / exhaust plug connecting pipe piece 20.

In this case, the flexible liner connecting tube pieces 24, 26 are manufactured from the same film material having the same blocking properties as the film material of the flexible liner 22, thereby preventing the inconvenient diffusion action of penetrating the plastic material. can do.

When the film structure of the liner film is multi-layered and asymmetrical layer arrangement, when the weld flange edge of the liner connection tube piece is annularly welded to the liner wall, the same film material or the same outer film layer are attached to each other. It is important that it is welded.

The liner 22 has a height of about 930 mm and a diameter of about 580 mm for a filling capacity of 220 liters. The smaller liner connecting tube piece 26 has a diameter of about 25 mm, and the larger and longer formed liner connecting tube piece 24 has a diameter of about 58 mm. Due to its thin walls, the liner itself is not shape stable but extremely flexible, flexible and compatible. The wall thickness of the multilayer liner composite film is about 100 μm to 300 μm, preferably about 150 μm. At a weight per unit area of about 100-150 g / m ² , a material weight of about 0.15-0.3 kg is produced per 220 liter liner bag. In this case, the ultra-thin composite layer may consist of a plurality of different materials, such as HDPE / LDPE / EVOH / PET / PA / PP or SiOx, with a layer of adhesive disposed in between. And / or may be provided with a glass fiber reinforcement or a woven fabric reinforcement. Depending on the application, the composite film is equipped with, for example, a barrier layer against hydrocarbon diffusion, oxygen diffusion, aromatic diffusion or water vapor diffusion, and in some cases a sterile antibacterial coating or a vapor-deposited silver-containing or aluminum-containing. A metal film is provided.

Structurally, the liner connecting tube pieces 24, 26 are welded from the inside to the inner wall of the liner top bottom 32 with a radial inward weld flange edge, then folded back from the inside to the outside. This will cover all existing film cut edges from contact with the filler. The film cut edge should be in contact with the filled liquid filler both at the weld flange edges of the welded liner connecting tube pieces 24 and 26 and at the inner demarcation of the through opening formed in the liner wall. There is no. This ensures perfect blocking properties over long transport and storage times of the stoppered drum and avoids damage to sensitive fillings due to diffusion.

In any case, in order to realize a special liner, the annular welding of both weld flange edges to the inner wall of the upper bottom of the liner is a manufacturing technology, a cut portion of the multilayer liner film for the closed liner body. It is important that this is done before the final welding is complete, otherwise the film connecting tube pieces can no longer be welded from the inside to the inner wall of the upper bottom of the liner.

In order to allow the liner 22 made of a flexible, thin-walled multilayer film to be placed inside the drum, the liner 22 is wound as seen in FIG. 3 to form an elongated rod-shaped roll 36. In this case, the upper end of the smaller liner connecting tube piece 26 to which the adapter ring 28 is welded protrudes, whereas the larger liner connecting tube piece 24 is caught and cannot be seen here. There is. An important feature of the liner material is that the liner connecting tube piece 24, which has a larger diameter, has at least twice its diameter before insertion into the plugged drum 10 and its free end. Is welded or airtightly closed.

The liner roll 36 is guided through the air supply / exhaust plug connecting tube piece 20 of the plugged drum 10, and the adapter ring 28 is mounted in the plug connecting tube piece 20 as described in more detail below. After the adapter ring 28 is mounted in the air supply / exhaust plug connection tube piece 20, compressed air is slowly blown into the liner from the smaller liner connection tube piece 26 via the hollow adapter ring 28. The liner spreads out and the larger liner connecting tube piece 24 to be welded, located on the opposite side, is pneumatically pneumatically seen from below from the corresponding filling and discharging plug connecting tube piece 18 of the plugged drum 10. It will be fully inflated until it is shown.

FIG. 4 shows the upper region of the plugged drum 10 with the filling and discharging plug connecting tube piece 18 for the BCS 70 × 6 standard closing means. The 2-inch plug connecting tube piece 18-and the similarly formed plug connecting tube piece 20-have a female thread designed as a coarse thread. Immediately below the female thread, a seal pedestal 38 with a narrow diameter is located for the seal ring attached to the 2-inch plug plug 44. Filling and Discharging Plug Connection Pipe Piece 18 has a reduced diameter connecting pipe piece neck 40 with an annular inner surface 42 as a welding platform for the 2-inch liner connecting pipe piece 24 to be welded underneath the female thread. have. The annular inner surface 42 of the connecting pipe piece neck 40 is formed by being smoothed as a welding base surface. The smoothing performed for the repair of the inner surface 42 is advantageously performed by positioning the drum overhead, for example using a honing tool, reamer or peeling knife, in which case the falling exfoliated plastic particles are downward. Since the compressed air is sucked toward the drum body and, in some cases, the compressed air is blown into the drum body through the other plug connecting tube piece 20 at the same time, the risk of the peeled plastic particles invading the drum body is eliminated anyway. There is.

When the liner 22 is inserted into the stoppered drum 10 and inflated, the liner connection pipe piece 24 to be welded from now on appears from the stopper connection pipe piece 18, and the liner connection pipe piece 24 is pulled to make an incision in the upper part. And put on the plug connecting tube piece 18. The liner connecting tube piece 24 is then radially firmly welded to the annular inner surface 42 (welding table surface) by the expansion welding method and cut to fit exactly, resulting in a commercially available 2-inch plug. As the 44 is screwed in, the seal ring can be used to seal the seal pedestal 38 located at the lower end of the female thread or the seal corresponding receiver directly above the weld pedestal surface. Other than the repair of the welding table surface, no other measures or conformance is taken in the standard plugged drum 10. The advantageous handling of the user-friendly plugged drum with the liner according to the present invention is realized mainly based on the special structural configuration and functional form of the insert for the air supply / exhaust plug connection tube piece 20.

As shown in FIG. 5, the closing insert for the 2-inch air supply / exhaust plug connection tube piece 20 consists of at least three parts. These are a male thread and a center that surrounds a hollow adapter ring 28, an upper sleeve-like adapter ring 28 of the flange ring 46, with an outer flange ring 46 located approximately in the middle and overhanging in the radial direction. A position fixing cap 52 having a central through opening 54 that covers the outside of the upper part of the ring nut 48 having the through opening 50 and the air supply / exhaust plug connecting pipe piece 20 from above.

The hollow sleeve-shaped adapter ring 28 comprises a female thread 56 in the upper region of its through opening. The female thread 56, designed as a coarse thread, has a reduced diameter seal pedestal 58 at the lower end.

On the outside of the lower surface of the flange ring 46 of the adapter ring 28, an annular seal ring 60, preferably formed as a rectangular flat seal, is located inside the plug connection tube piece 20-opposite. As in the case of the plug connecting tube piece 18 located on the side-it abuts and seals the seal pedestal formed at the lower end of the female thread on the upper side of the reduced diameter connecting tube piece neck. The upper surface of the flange ring 46 of the adapter ring 28 is loaded from above by a ring nut 48 surrounding the upper region of the adapter ring 28, and the male thread 62 of the ring nut 48 designed as a coarse thread is plugged. It engages with the female thread of the connecting tube piece 20 and presses the seal ring 60 of the adapter flange ring 46 against the seal pedestal 38 formed at the lower end of the female thread of the plug connecting tube piece 20. Below the flange ring 46, a hose-shaped liner connecting tube piece 26 is welded to the annular sleeve-shaped adapter ring 28 from the outside in the radial direction.

In the female thread 56 of the adapter ring 28 designed as a coarse thread, a smaller 3/4 inch plug plug 64 can be screwed in from above, and the 3/4 inch plug plug 64 is its seal ring 66. Thus, the female thread 56's reduced diameter seal pedestal 58 is sealed.

When the liner 22 is inserted into the drum body and both liner plugs are installed in the plug connecting pipe piece of the drum, the ring nut 48 is firmly tightened, so that the seal ring 60 is a seal provided on the plug connecting pipe piece 20. It will be airtightly pressed against the pedestal and the intermediate air space between the liner and the inner wall of the drum will be completely airtightly closed. After that, the position fixing cap 52 provided with the central through opening 54 is fitted over the air supply / exhaust plug connecting pipe piece 20 from above, and at that time, the air supply / exhaust plug connecting pipe piece 20 surrounds the outside of the upper region thereof. Will be done. The position-fixing cap 52 is formed, preferably as a thin-walled plastic cap, with dissociable or non-dissociable snap-locking closing means, and the ring nut 48 for fixing the adapter ring 28 is unwillingly or It is used to protect against improper disengagement and to allow only access to the 3/4 inch air tap 38x6 which must be open during filling and draining of the plugged drum.

In one other embodiment, the position fixing cap 52 is formed as a non-dissociably bent thin metal sheet lid with a central through opening 54, which additionally dissociable. It is covered with a thin-walled closed plastic protective cap or plastic sealing cap with snap-locking closure means. In this case, an additional sealing cap is provided as a protective measure against dirt and rainwater and is easily removable for unscrewing the 3/4 inch plug plug 64, while dissociating. The impossibly fitted, thin metal lid with through-opening prevents accidental or unauthorized unscrewing of the ring nut 48 in any case and can only be removed with suitable tools in the recycling plant. It has become like. That is, in the air supply / exhaust plug 20 having such a configuration, the female thread of the adapter and 3/3 / in the larger 70 × 2 closing means between the female thread of the plug connecting pipe piece and the male thread of the ring nut. A smaller 38x6 closing means is inserted between the male thread of the 4-inch plug.

To clearly show the functional form of the plugged drum 10 according to the present invention, FIG. 6 shows a vacuum bell with a seal ring 72 to evacuate the intermediate air space between the liner surface and the inner wall of the drum. It is shown that the body 70 is put on the air supply / exhaust plug 20. A rod-shaped towing tool 74 is arranged in the center of the vacuum bell-shaped body 70, and the towing tool 74 can be moved up and down as suggested by the double arrow. The tow tool 74 is locked by plunging into a 3/4 inch plug plug 64 that is tightly screwed into the adapter ring 28 below. When the ring nut 48 is loosened or unwound, the plug plug 64 is easily lifted with the adapter ring 28 via the traction tool 74 so that the seal 60 provided on the flange ring 46 of the adapter ring 28 is removed. It lifts slightly from the seal pedestal 38 of the plug connecting tube piece 20 to release the annular gap 76, and the inconvenient intermediate air is completely expelled through the annular gap 76 from the intermediate air space between the liner 22 and the inner wall of the drum. After this process is complete, the ring nut 48 is screwed in and tightened to maintain the vacuum continuously. As a result, the adapter ring 28 is immovably pressed against the seal pedestal 38 of the plug connecting pipe piece 20 together with the lower seal ring 60. The 2-inch plug connecting tube piece 20 is then further overlaid with a position-fixing cap 52 with a central through opening 54 that allows the filler and ejector free access to the 3/4 inch plug plug 64. Be done. The position fixing cap 52 prevents accidental loosening or twisting of the ring nut 48 with vacuum loss. A conventional thin plastic snap lid may be further snap-fitted onto the positioning cap 52 or the 2-inch plug connection tube piece 20 to protect it from dirt and rainwater.

In the present invention, the liner 22 is shape-adapted and mounted entirely on the inner surface of the plugged drum 10 like a second jacket. A major advantage of such a second jacket liner is that the film bag does not require much of the conventional high tear strength against fluttering during filling or reciprocating impact of the liquid filling during transport transfer. , Is in the point. This is because, in this case, the film material of the liner 22 is permanently fixed and affixed to the inner surface of the stoppered drum 10 or is re-detachably bonded, so that the film material of the liner 22 is Because it doesn't move at all. As a result, a film material that is cheaper than conventional ones and has high blocking properties and is prone to cracking can also be used.

Conclusion:
The present invention does not form a complex novel structure of a plugged drum, but is a peculiar form in a standard plugged drum with a liner, while the inconvenient intermediate air between the liner and the inner wall of the drum immediately after the liner is inserted. It makes it possible to evacuate the drum and, on the other hand, to exhaust air from the inside of the drum during filling or supply air to the inside of the drum when taking out the filling by using the same plug connection tube piece. .. This configuration was conceived for a well-known plugged drum type on the market with two 2-inch plugs, so not only newly manufactured plugged drums, but also of this type. All used plugged drums on the market can also be equipped with new liners to make them reusable.

10 Drum with plastic stopper 12 Cylindrical drum wall (10)
14 Disc-shaped lower bottom 16 Disc-shaped upper bottom 18 Filling and discharging plug Connection pipe piece (10)
20 Air supply / exhaust plug connection pipe piece (10)
22 Liner (film bag)
24 Liner connection pipe piece for filling and discharging (22)
26 Liner connection pipe piece for air supply and exhaust (22)
28 Adapter ring (26)
30 Cylindrical liner wall (22)
32 Disc-shaped liner upper bottom (22)
34 Disc-shaped liner bottom bottom (22)
36 Liner roll (22)
38 Seal pedestal (18)
40 Connection tube piece neck (18)
42 Welding table / inner surface (40)
442 2-inch plug plug (18)
46 Flange ring (28)
48 Ring nut 50 Through opening (48)
52 Position fixing cap 54 Through opening (52)
56 Female thread (28)
58 Seal pedestal (56)
60 Seal ring (46)
62 Male thread (48)
64 3/4 inch plug plug 66 Seal ring (64)
68 Penetration opening (28)
70 Vacuum bell-shaped body 72 Seal ring (70)
74 Towing tool (70)
76 Circular gap

Claims (18)

A capped drum (10) made of thermoplastic with a liner (22) made of a thin-walled plastic film inserted, with a cylindrical drum wall (12), a disc-shaped lower bottom (14), and It has a disk-shaped upper bottom (16), and two plug connecting tube pieces (18, 20) that can be closed by a closing plug are arranged on the upper bottom (16), and one of the above. The plug connecting pipe piece is formed as a filling / discharging plug connecting pipe piece (18), and the other plug connecting pipe piece is formed as a supply / exhaust plug connecting pipe piece (20). Inside the drain plug connecting pipe piece (18) and the air supply / exhaust plug connecting pipe piece (20), the corresponding filling / discharging liner connecting pipe piece (24) and the air supply / exhaust liner of the liner (22), respectively. A connecting pipe piece (26) is attached, and the closing plug for the air supply / exhaust plug connecting pipe piece (20) is formed from a plurality of parts and is formed from at least a lower adapter ring (28) and an upper side. The adapter ring (28) and the cap nut or ring nut (48) are provided with central through openings (50, 68), respectively. The adapter ring (28) has a central plug plug (64) screwed into the central through opening (68) of the adapter ring (28), and the adapter ring (28) is the supply of the liner (22). The air supply / exhaust of the plugged drum (10) via the flange ring (46) by the ring nut (48) firmly welded and screwed to the upper end of the exhaust liner connecting pipe piece (26). In the capped drum (10) fixed in the plug connecting tube piece (20)
-The two plug connecting tube pieces (18, 20) are equipped with a female thread (BCS70 x 6 closing means) and a seal pedestal (38) located below it as a 2 -inch plug connecting tube piece of the same size. Is formed and
-The closing plug for the filling / discharging plug connecting pipe piece (18) is a 2 -inch plug plug having a male thread (BCS70 × 6 closing means) and the filling / discharging plug located below the male thread (BCS70 × 6 closing means). It is formed with a seal ring for sealing the seal pedestal (38) provided on the connecting pipe piece (18).
-The filling and discharging plug connecting pipe piece (18) has a smoothed annular weld base inner surface (42) at the narrowest penetration point in the connecting pipe piece neck (40) below the female thread. The upper end of the filling / discharging liner connecting pipe piece (24) of the liner (22) is firmly welded to the inner surface (42) of the welding table.
-The plug plug screwed into the central through opening (68) of the adapter ring (28) is a 3/4 inch plug plug (64) with a male thread and a seal ring (66) located below it. Formed with and
-The flange ring (46) of the adapter ring (28), engaged from above by the threaded ring nut (48), has an annular seal ring (60) on the outer edge of its lower surface. The drum (10) with a plug is characterized in that the inside of the drum is sealed with respect to the seal pedestal (38) below the female thread thread provided on the air supply / exhaust plug connection pipe piece (20). .. The screw-fitted ring nut (48) is covered with a position-fixing cap (52) that is snap-fitted or tightened from above, and the position-fixing cap (52) also has a central through opening (54). The stopper according to claim 1, wherein the 3/4 inch stopper plug (64) screwed into the center of the adapter ring (28) can be freely accessed through this central through opening. Drum (10). The annular seal ring (60) provided on the outer edge of the lower surface of the flange ring (46) provides an intermediate air space between the liner surface and the inner wall of the drum in the air supply / exhaust plug connecting pipe piece (20). The stoppered drum (10) according to claim 2 , which is sealed to the seal pedestal (38) arranged under the female thread. When the ring nut (48) is loosened or untwisted, the adapter ring (28) provided with the annular seal ring (60) on the lower surface of the flange ring (46) is a tightly screwed center. Together with the 3/4 inch plug (64) of the above, the seal ring (60) is formed so as to be liftable upward by a traction tool (74) guided through the vacuum bell-shaped body (70). ) And the seal pedestal (38), an annular gap (76) is formed with the liner surface by a vacuum pump connected to the vacuum bell-shaped body (70) through the annular gap (76). The plugged drum (10) according to claim 3 , wherein the intermediate air space between the drum inner wall and the inner wall can be evacuated. After evacuation, when the liner surface is applied almost completely or entirely to the inner wall of the drum, the adapter ring (28) is a tightly screwed center of the 3/4 inch plug. Together with (64), it is formed so as to be guided downward by the traction tool (74) guided through the vacuum bell-shaped body (70), and is formed on the lower surface of the flange ring (46). The annular seal ring (60) is formed in the air supply / exhaust plug connection pipe piece (20) so as to be firmly and airtightly pressable against the seal pedestal (38) arranged below the female thread. The plugged drum (10) according to claim 4 , which is permanently fixed in an airtight position by the ring nut (48) tightly screwed from above. -In a state where the ring nut (48) is firmly screwed, the liquid filling is put through the filling / discharging plug connecting pipe piece (18) located on the opposite side through the pressure filling pipe in the automatic filling equipment. To fill the plugged drum (10) and to remove the liquid filling via a negative pressure suction tube in an automatic discharge facility-to the centrally located 3/4 inch plug (64), said. It is freely accessible through the position fixing cap (52) provided with a central through opening (54), and the 3/4 inch plug plug (64) uses a screw fastening tool. The plugged drum (10) according to any one of claims 2 to 5 , which is formed to be unscrewable and re-screwable automatically by hand or by an automatic screw fastening device. In the liner (22) for inserting into the stoppered drum according to any one of claims 1 to 6 .
A cylindrical liner wall (30), a disc-shaped lower bottom portion (34), and a disc-shaped upper bottom portion (32) are provided, and the upper bottom portion (32) is provided with two liner connecting tube pieces ( 24, 26) are arranged, one of the liner connecting pipe pieces has a larger diameter than the other liner connecting pipe piece, and is used as a filling / discharging connecting pipe piece (24). The other liner connecting tube piece (26) is used for air supply / exhaust during filling or discharging of the liquid filling in the liner and the plugged drum (10), and has a smaller diameter. The upper end of 26) is tightly welded to the adapter ring (28), which has a flange ring (46) overhanging in the radial direction of the flange ring (46). A liner (22), characterized in that an annular seal ring (60) is arranged or attached to the lower surface. The liner connecting pipe pieces (24, 26) are welded from the inside to the liner wall of the liner upper bottom portion (32) with a weld flange edge inward in the radial direction, and are folded back from the inside to the outside. All existing film cut edges are covered so that they do not come into contact with the filling, and the film cut edges are-the weld flange edges of the welded liner connection tube pieces (24,26). The liner (22) according to claim 7 , wherein neither in the inner demarcation portion of the through opening formed in the liner wall-never comes into contact with the filled liquid filler. 22. The liner (22) of claim 7 or 8 , wherein the welded liner connecting tube piece (24,26) has the same multilayer film structure as the liner wall (30, 32, 34). The liner connecting tube piece (24) with a larger diameter has at least twice its diameter prior to insertion into the plugged drum (10) and its free end is welded. The liner (22) according to claim 7 , 8 or 9 , which is closed or airtightly closed. The liner connecting tube piece (24) having a larger diameter is cut to an appropriate length after being inserted into the plugged drum (10), and is directly below the female thread of the plug connecting tube piece (18) for filling and discharging. The liner (22) according to any one of claims 7 to 10 , which is welded in the radial direction to the inner surface (42) of the welding table formed on the connecting pipe piece neck (40). The following method step in the method of manufacturing the plugged drum (10) according to any one of claims 1 to 6 , comprising the liner (22) according to any one of claims 7 to 11 . , That is:
Two 2-inch plug connection tube pieces with -70 x 6 closing means, 2 -inch plug plug (44) for 70 x 6 closing means, and 3/4 inch plug plug for 70 x 6 closing means (64) ), And one of the 2-inch plug connection tube pieces equipped with the 2-inch plug (44) is connected to a filling / discharging plug connection for a liquid filling. The other 2-inch plug connection tube piece used as the tube piece (18) is used for the filling volume inside the liner (22) and the intermediate air space between the outer surface of the liner (22) and the inner wall of the drum. Step to be used as the air supply / exhaust plug connection pipe piece (20) for
-Liner (22) with two liner connecting tube pieces (24, 26) of different sizes, provided and welded for the 2-inch plug connecting tube piece with 70x6 closing means. A slightly longer liner connection piece with a free end and a shorter, slightly smaller liner connection piece, with a lower seal at the end of the liner connection piece. A step of preparing a liner (22) with a liner connecting tube piece to which a hollow sleeve-like adapter ring (28) with a ring (60) is welded.
-A step of winding the liner (22) to form an elongated roll (36) on which the welded adapter ring (28) is placed.
-The elongated roll (36) is inserted through the air supply / exhaust plug connection pipe piece (20), and the central through opening (50) and the 2-inch plug connection of the air supply / exhaust plug connection pipe piece (20). A ring nut (48) provided with a male thread for the 70 × 6 closing means in a tube piece, the adapter ring (28) being fixed by a ring nut (48) surrounding the adapter ring (28). The adapter ring (28) has the lower seal ring (60) in the air supply / exhaust plug connection pipe piece (20), and the intermediate between the outer surface of the liner (22) and the inner wall of the drum. Steps to seal the air space,
-Compressed air into the air supply / exhaust plug connection piece (20), the larger liner connection piece (24) with the liner (22) fully inflated and welded is located on the opposite side. The step of blowing from the filling / discharging plug connecting pipe piece (18) until it appears.
-Cut off the welded free end of the larger liner connecting tube piece (24) and point the liner connecting tube piece outward to the filling and discharging plug connecting piece of the plugged drum (10). Step to fold back to cover (18),
-The liner connecting pipe piece (24) is radially welded under the female thread of the filling and discharging plug connecting pipe piece (18), and the excess on the upper side of the welded annular surface (42) below the female screw thread. A step of cutting out the liner connecting tube piece (24) that does not and / or protrudes to fit exactly.
-The vacuum bell-shaped body (70) is put on the air supply / exhaust plug connection pipe piece (20), the ring nut (48) is loosened, and the adapter ring (28) is lifted. A negative pressure pump connected to (70) sucks all air out of the intermediate air space between the outer surface of the liner (22) and the inner wall of the drum, and the outer surface of the liner (22) is the drum. Step to evacuate until it is fully applied to the inner wall,
-The liner and the drum by tightening the ring nut (48) and pressing the adapter ring (28) together with the lower seal ring (60) within the air supply / exhaust plug connection tube piece (20). A step to permanently maintain the vacuum between the inner wall,
-The sleeve-shaped adapter ring (56) in which the 2-inch plug (44) is screwed into the 2-inch plug connecting pipe piece (18) of the filling / discharging plug connecting pipe piece and has a female thread (56). A method comprising screwing the 3/4 inch plug (64) into 28). In order to prevent accidental loosening or twisting of the ring nut (48) with vacuum loss, the air supply / exhaust plug connection pipe piece (20) is provided with a central through opening (54) for protective coating. 12. The method of claim 12 , wherein the position fixing cap (52) is covered and fitted. While evacuating through the air supply / exhaust plug connecting pipe piece (20), compressed air flows inside the liner (22) through the filling / discharging plug connecting pipe piece (18) located on the opposite side. 12. The method of claim 12 , wherein the liner film of the liner (22) is fully pressed against the inner wall of the plugged drum (10) and all intermediate space air is extruded. The compressed air blown is high temperature air and is blown in to heat-activate the liner film. As a result, the outer surface of the liner film exerts an adhesive action and the inner wall of the plugged drum (10) is blown. 12. The method of claim 12 , 13 or 14 , which will adhere to and / or removably adhere to. In order to take out the liner (22) from the inside of the drum, the adapter seal ring (60) and the plug connection tube piece seal are provided in a state where the ring nut (48) is loosened and the adapter ring (28) is lifted. Through the annular gap between the pedestal (38), compressed air is blown into the intermediate air space between the liner surface and the inner wall of the drum, thereby adhering to and / or sticking to the inner wall of the drum. 12. The method of claim 12 , 13 , 14 or 15 , wherein the liner surface is peeled off. One of claims 12 to 16 , wherein evacuation is performed inside the liner (22) through the filling / discharging plug connecting tube piece (18) until the liner is completely separated from the inner wall of the drum. The method described in item 1. The liner connecting pipe piece (24) welded to the filling / discharging plug connecting pipe piece (18) is first cut off directly under the welded annular surface (42), and the filling / discharging plug connecting pipe piece ( It is slightly pulled out from 18) and sealed, and then the entire liner (22) is pulled out from the inside of the drum together with the adapter ring (28) through the air supply / exhaust plug connecting tube piece (20) located on the opposite side. , The method according to any one of claims 12 to 17 .

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